diff options
Diffstat (limited to 'arch/arm/mach-kirkwood/board-dt.c')
-rw-r--r-- | arch/arm/mach-kirkwood/board-dt.c | 85 |
1 files changed, 83 insertions, 2 deletions
diff --git a/arch/arm/mach-kirkwood/board-dt.c b/arch/arm/mach-kirkwood/board-dt.c index d8b666c39fd1..27c1877e6dda 100644 --- a/arch/arm/mach-kirkwood/board-dt.c +++ b/arch/arm/mach-kirkwood/board-dt.c @@ -13,6 +13,8 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_net.h> #include <linux/of_platform.h> #include <linux/clk-provider.h> #include <linux/clocksource.h> @@ -58,6 +60,85 @@ static void __init kirkwood_legacy_clk_init(void) clk_prepare_enable(clk); } +#define MV643XX_ETH_MAC_ADDR_LOW 0x0414 +#define MV643XX_ETH_MAC_ADDR_HIGH 0x0418 + +static void __init kirkwood_dt_eth_fixup(void) +{ + struct device_node *np; + + /* + * The ethernet interfaces forget the MAC address assigned by u-boot + * if the clocks are turned off. Usually, u-boot on kirkwood boards + * has no DT support to properly set local-mac-address property. + * As a workaround, we get the MAC address from mv643xx_eth registers + * and update the port device node if no valid MAC address is set. + */ + for_each_compatible_node(np, NULL, "marvell,kirkwood-eth-port") { + struct device_node *pnp = of_get_parent(np); + struct clk *clk; + struct property *pmac; + void __iomem *io; + u8 *macaddr; + u32 reg; + + if (!pnp) + continue; + + /* skip disabled nodes or nodes with valid MAC address*/ + if (!of_device_is_available(pnp) || of_get_mac_address(np)) + goto eth_fixup_skip; + + clk = of_clk_get(pnp, 0); + if (IS_ERR(clk)) + goto eth_fixup_skip; + + io = of_iomap(pnp, 0); + if (!io) + goto eth_fixup_no_map; + + /* ensure port clock is not gated to not hang CPU */ + clk_prepare_enable(clk); + + /* store MAC address register contents in local-mac-address */ + pr_err(FW_INFO "%s: local-mac-address is not set\n", + np->full_name); + + pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL); + if (!pmac) + goto eth_fixup_no_mem; + + pmac->value = pmac + 1; + pmac->length = 6; + pmac->name = kstrdup("local-mac-address", GFP_KERNEL); + if (!pmac->name) { + kfree(pmac); + goto eth_fixup_no_mem; + } + + macaddr = pmac->value; + reg = readl(io + MV643XX_ETH_MAC_ADDR_HIGH); + macaddr[0] = (reg >> 24) & 0xff; + macaddr[1] = (reg >> 16) & 0xff; + macaddr[2] = (reg >> 8) & 0xff; + macaddr[3] = reg & 0xff; + + reg = readl(io + MV643XX_ETH_MAC_ADDR_LOW); + macaddr[4] = (reg >> 8) & 0xff; + macaddr[5] = reg & 0xff; + + of_update_property(np, pmac); + +eth_fixup_no_mem: + iounmap(io); + clk_disable_unprepare(clk); +eth_fixup_no_map: + clk_put(clk); +eth_fixup_skip: + of_node_put(pnp); + } +} + static void __init kirkwood_dt_time_init(void) { of_clk_init(NULL); @@ -82,12 +163,12 @@ static void __init kirkwood_dt_init(void) kirkwood_l2_init(); kirkwood_cpufreq_init(); - + kirkwood_cpuidle_init(); /* Setup clocks for legacy devices */ kirkwood_legacy_clk_init(); kirkwood_pm_init(); - kirkwood_cpuidle_init(); + kirkwood_dt_eth_fixup(); #ifdef CONFIG_KEXEC kexec_reinit = kirkwood_enable_pcie; |